Mixture of molten alumina-zirconia grains

Abrasive tool making process – material – or composition – With inorganic material

Reexamination Certificate

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C051S293000, C051S309000

Reexamination Certificate

active

08043392

ABSTRACT:
The mixture of molten alumina-zircon grains has the following chemical composition in percentage by weight to give 100%: 40-45.5% ZrO+HfO2; 46-58% Al2O3; 0-10% additive; <0.8% SIO2and <1,2% impurities. The mixture is characterised in that the degree of impurity-containing grains is less than 2% and the nodule concentration measured on the section of any grain of the mixture is greater than 500 nodules per mm2in at least 50% of cases.

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patent: 5567214 (1996-10-01), Ashley
patent: 2004/0040218 (2004-03-01), Aleonard et al.
patent: WO 00/34201 (2000-06-01), None

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